Indoor simulation experiment device for stratum sand consolidation

Abstract

The utility model provides an indoor simulation experiment device for stratum sand consolidation, which belongs to the technical field of energy exploitation, and comprises an experiment table and a sand loading groove, the experiment table is provided with a positioning assembly for fixing the sand loading groove, the experiment table is provided with a strength tester, and the experiment table is provided with a displacement assembly for driving the strength tester to move towards the sand loading groove. The experiment table is provided with a sealing cover arranged outside an experiment area in a covering mode, the top of the experiment table and the inner wall of the sealing cover are each provided with an environment change simulation assembly, and actual stratum sand consolidation environment changes are simulated through the environment change simulation assemblies in the sealing cover and on the upper surface of the experiment table; and the accuracy of an experiment result is ensured. In the experiment process, the sealing cover is opened and closed through the adjusting assembly, the simulation experiment is carried out in the sealing cover, the sealing performance of the environment where the experiment device is located is guaranteed, and therefore the accuracy of the experiment result is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of energy extraction technology, specifically to an indoor simulation experimental device for stratum sand fixation. Background Technology

[0002] Downhole mining technology is much more difficult, but since most energy resources are buried underground, it is necessary to use downhole mining for construction. During the mining process, appropriate drill bits need to be selected for the solid sand layer on the ground to ensure construction efficiency.

[0003] A related technology (publication number: CN219061599U) discloses a multifunctional sand control performance evaluation device for downhole formations. The disclosed technical solution involves simulating the well construction environment during geothermal, coalbed methane, and oil and gas extraction using a formation simulation device. An inner cylinder support frame, an outer cylinder support frame, and a vessel are sequentially fitted around the outside of the sand control pipe. An artificial formation is filled between the inner and outer cylinder support frames, and an experimental medium is filled between the vessel and the outer cylinder support frame. The experimental medium enters through the medium inlet of the vessel, passes through the outer cylinder support frame, the artificial formation, the inner cylinder support frame, and the sand control pipe, and exits through the medium outlet of the bottom seal. This structure can effectively simulate formation and well completion characteristics. When simulating different well completion methods, the inner cylinder support frame can use the pipe wall used for the corresponding well completion method. In particular, when simulating open-hole well completion, the inner cylinder support frame is removed. Simultaneously, the condenser and separator of the circulation device perform solid-liquid condensation and separation of the experimental medium and sand discharged from the medium outlet, and an injection pump provides the driving pressure for the experimental medium. A device for testing the sand-fixing strength of sand-fixing products under simulated geological temperature and pressure conditions in a laboratory.

[0004] The above-disclosed technical solutions reveal the following problems: During the drilling process through the sand-fixing layer of the stratum, the strength of the sand-fixing layer varies due to changes in the temperature and pressure of the stratum. Therefore, it is necessary to select appropriate mining tools. To address this, relevant personnel first tested the sand-fixing layer of the stratum under different temperatures and pressures, and then selected appropriate tools based on the test results to ensure the smooth progress of the construction process. In response, we have proposed a novel indoor simulation experimental device for sand-fixing of stratum.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background section of this application, and therefore may include prior art information that does not constitute prior art information known to those skilled in the art. Summary of the Invention

[0006] This utility model aims to solve at least one of the technical problems existing in the prior art or related technologies. To address the problem of detecting the sand fixation strength at mining locations in the prior art, this utility model provides an indoor simulation experimental device for sand fixation in formations. This device combines a sand fixation strength detection component with an environmental control component to facilitate construction and improve mining efficiency. The specific technical solution is as follows:

[0007] An indoor simulation experimental device for sand fixation in strata includes an experimental platform and a sand-filling tank. The experimental platform is equipped with a positioning component for fixing the sand-filling tank, a strength tester is provided on the experimental platform, and a displacement component is provided on the experimental platform to drive the strength tester to move towards the sand-filling tank. A sealing cover is provided on the experimental platform to cover the outside of the experimental area. Environmental change simulation components are provided on the top of the experimental platform and the inner wall of the sealing cover.

[0008] In the above technical solution, the environmental change simulation component includes a temperature change simulation component and a pressure change simulation component.

[0009] The temperature change simulation component includes a cavity formed on the top of the experimental platform, and the cavity is located at the center of the positioning component. An electric heating tube is embedded inside the cavity.

[0010] The pressure change simulation component includes a hydraulic cylinder fixedly installed on the top of the inner wall of the sealing cover. A pressure plate is fixedly installed on the piston end of the hydraulic cylinder, and the pressure plate corresponds to the sand loading groove.

[0011] The displacement component includes a support base fixedly installed on the test bench, a guide rail is provided between the support base and the strength tester, and the side wall of the sand filling trough is provided with a test hole corresponding to the strength tester.

[0012] The positioning assembly includes a positioning seat fixedly installed on the experimental platform, and a positioning element is threadedly connected to the inner cavity of the positioning seat.

[0013] The experimental platform is equipped with an adjustment component for opening and closing the sealing cover.

[0014] The adjustment assembly includes a lead screw rotatably mounted on the experimental platform, with a movable seat connected to the external thread of the lead screw, and the movable seat is fixedly mounted on the side wall of the sealing cover.

[0015] The experimental platform is equipped with a feeding component for conveying materials into the sand tank.

[0016] The feeding assembly includes a feeding trough rotatably mounted on the experimental platform, and a cylinder is rotatably mounted between the feeding trough and the experimental platform.

[0017] Compared with the prior art, the beneficial effects of this utility model are: the indoor simulation experimental device for sand fixation in strata:

[0018] First, during the experiment, the sealing cover was opened and closed by adjusting the components. The simulation experiment was carried out inside the sealing cover to ensure the airtightness of the environment, thereby ensuring the accuracy of the experimental results.

[0019] Second, the heating temperature of the electric heating tube is adjusted by a temperature controller to simulate the temperature change of the environment in which the formation is in sand fixation. The sand fixation environment is simulated according to the actual temperature change. Then, the sand fixation strength of the formation under different temperature environments is tested by a strength tester. Through comparison and analysis of multiple sets of data, the accuracy of the test results is ensured.

[0020] Third, the movable end of the hydraulic cylinder drives the pressure plate to move into the sand loading trough and applies pressure to the sand-fixing formation inside. The pressure is simulated and adjusted according to the actual pressure environment changes, so as to obtain experimental data based on the actual environmental changes. By comparing and analyzing the data, the appropriate drilling tools are selected, thereby ensuring the stable progress of the construction.

[0021] Fourth, the test end of the strength tester is embedded in the test hole and extends to the surface of the internal stratum sand by means of the guide rail. The strength tester is used to test under different temperature and pressure environments, and the data is analyzed to select the appropriate mining tools, thereby ensuring the efficiency of the energy mining construction process.

[0022] Fifth, the sand-filling trough is fixed by the positioning seats around the perimeter, thus ensuring the stability of the formation sand fixation detection process.

[0023] 6. After the sand loading trough is fixed on the experimental platform, the movable end of the cylinder drives the hinged feeding trough to rotate, so that the material dropping end of the feeding trough faces the sand loading trough. Then, the material is fed into the trough, which brings convenience to the operation process of relevant personnel. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an indoor simulation experimental device for sand fixation in strata according to the present invention. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the structure of an indoor simulation experimental device for sand fixation in strata according to the present invention. Figure 2 ;

[0026] Figure 3 This is a structural explosion diagram of an indoor simulation experimental device for sand fixation of a stratum according to the present invention;

[0027] Figure 4 This is a schematic diagram of the outer cover structure of this utility model;

[0028] Figure 5 for Figure 2 Enlarged view of a portion at point A;

[0029] Figure 6 for Figure 3 A magnified view of section B;

[0030] in, Figures 1 to 6 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1-Experimental platform, 2-Sealing cover, 3-Sand trough, 4-Hydraulic cylinder, 5-Pressure plate, 6-Heating tube, 7-Screw, 8-Second bracket, 9-Guide rod, 10-First bracket, 11-Drive motor, 12-Moving seat, 13-Positioning seat, 14-Positioning component, 15-Fixed frame, 16-Cylinder, 17-Feeding trough, 18-Test hole, 19-Support seat, 20-Guide rail, 21-Strength tester, 22-First connecting seat, 23-Cavity, 24-First connecting component, 25-First rotating shaft, 26-Second connecting component, 27-Second rotating shaft, 28-Second connecting seat, 29-Modible seat, 30-Modible shaft. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] The following are specific implementation cases and appendices. Figure 1-6 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0033] An indoor simulation experimental device for formation sand fixation includes an experimental platform 1 and a sand-filled tank 3. The experimental platform 1 is equipped with a positioning component for fixing the sand-filled tank 3. The sand-filled tank 3 is used to hold the formation sand. The positioning component fixes the sand-filled tank 3 to the upper surface of the experimental platform 1, and then the experimental simulation is performed. A strength tester 21 is installed on the experimental platform 1, and a displacement component is provided to drive the strength tester 21 towards the sand-filled tank 3. By adjusting the position of the strength tester 21, it is moved to a position corresponding to the sand-filled tank 3, and then the strength of the formation sand inside the sand-filled tank 3 is tested. A sealing cover 2, made of colorless and transparent material, is installed on the experimental platform 1 to cover the experimental area. The experimental process can be observed. Environmental change simulation components are installed on the top of the experimental platform 1 and the inner wall of the sealing cover 2.

[0034] The environmental change simulation component inside the sealed enclosure 2 and on the upper surface of the experimental platform 1 simulates the actual environmental changes in formation sand fixation. Comparison of multiple sets of data ensures the accuracy of the experimental results. During the experiment, the sealed enclosure 2 is opened and closed by adjusting the component. The simulation experiment is conducted inside the sealed enclosure 2, ensuring the airtightness of the environment and thus guaranteeing the accuracy of the experimental results.

[0035] The environmental change simulation component includes a temperature change simulation component and a pressure change simulation component. The temperature change simulation component includes a cavity 23 located at the top of the experimental platform 1, centered on the positioning component. An electric heating element 6 is embedded inside the cavity 23. The electric heating element 6 is electrically connected to an external power source via wires. The cavity 23 is located below the center of the positioning component on the upper surface of the experimental platform 1, ensuring that after the sand-filled tank 3 is fixed by the positioning component, its bottom covers the cavity 23. The electric heating element 6 is electrically connected to a temperature controller.

[0036] The heating temperature of the electric heating element 6 is adjusted by a temperature controller to simulate the temperature changes in the environment where the formation is stabilizing sand. The formation stabilization environment is simulated based on actual temperature changes. Then, the strength of the formation stabilization sand under different temperature environments is tested by a strength tester 21. By comparing and analyzing multiple sets of data, the accuracy of the test results is ensured.

[0037] It is worth noting that the pressure change simulation component includes a hydraulic cylinder 4 fixedly mounted on the top of the inner wall of the sealing cover 2. A pressure plate 5 is fixedly mounted on the piston end of the hydraulic cylinder 4, and the pressure plate 5 corresponds to the sand-filling groove 3. The cylinder end of the hydraulic cylinder 4 is vertically fixed to the top of the inner wall of the sealing cover 2, and the lower end of the piston of the hydraulic cylinder 4 is vertically fixed to the upper surface of the pressure plate 5. The position of the hydraulic cylinder 4 ensures that the pressure plate 5 moves into the sand-filling groove 3 along with the piston end. The specifications of the pressure plate 5 correspond to the groove width of the sand-filling groove 3, allowing the pressure plate 5 to slide against the inner wall after moving into the sand-filling groove 3.

[0038] When simulating pressure changes in the environment where the formation is stabilizing sand, hydraulic cylinder 4 is driven. The movable end of hydraulic cylinder 4 moves pressure plate 5 into the sand-filling trough 3, applying pressure to the stabilizing sand within. Simulation adjustments are made based on actual pressure environment changes, thereby obtaining experimental data. By comparing and analyzing this data, appropriate drilling tools are selected, ensuring stable drilling operations.

[0039] In addition, the displacement assembly includes a support base 19 fixedly mounted on the test bench 1, and a guide rail 20 is provided between the support base 19 and the strength tester 21. The support base 19 is vertically fixed to the upper surface of the test bench 1 and is fixed to one side of the positioning assembly, so that the strength tester 21 moves a certain distance before the testing end detects the sand fixation of the formation. The guide rail 20 can be an electric guide rail, and the track of the guide rail 20 is fixed to the upper surface of the support base 19. The slider of the guide rail 20 is fixed to the bottom of the strength tester 21, and the slider of the guide rail 20 is slidably connected to the track.

[0040] The sidewall of the sand-filling trough 3 has test holes 18 corresponding to the strength tester 21. Test holes 18 penetrating the sidewall are formed on the surface of the sand-filling trough 3. Before fixing the sand-filling trough 3 onto the test bench 1, the side with the test holes 18 is mounted in the opposite position to the strength tester 21. The diameter of the test holes 18 corresponds to the test end of the strength tester 21. Then, the test end of the strength tester 21 is embedded inside the test holes 18 and extends to the surface of the internal formation sand via guide rails 20. Simulations of different temperature and pressure environments are performed using the strength tester 21, and data analysis is conducted to select appropriate mining tools, thereby ensuring the efficiency of the energy extraction construction process.

[0041] In addition, the positioning assembly includes positioning seats 13 fixedly mounted on the experimental platform 1, with positioning elements 14 threadedly connected to the inner cavity of the positioning seats 13. Four positioning seats 13 are vertically fixed to the upper surface of the experimental platform 1, and are symmetrically arranged circumferentially around the outer periphery of the cavity 23. Each positioning seat 13 has a threaded through hole, and the positioning element 14 can be a bolt. The bolt passes through the threaded through hole to fix the sand-filling groove 3 embedded in the center of the four positioning seats 13, thereby ensuring the stability of the formation sand-fixing detection process.

[0042] Furthermore, the experimental platform 1 is equipped with an adjustment assembly for opening and closing the sealing cover 2. The adjustment assembly includes a lead screw 7 rotatably mounted on the experimental platform 1, with a movable seat 12 threadedly connected to the external end of the lead screw 7. The movable seat 12 is fixedly mounted on the side wall of the sealing cover 2. A first bracket 10 is vertically fixedly mounted on the upper surface of the experimental platform 1. Bearings are embedded in the inner walls on both sides of the first bracket 10, and the two ends of the lead screw 7 are respectively embedded in the two bearings. The movable seat 12 has a threaded through-hole penetrating the inner cavity on its surface. When the lead screw 7 rotates, the movable seat 12 moves the sealing cover 2 up and down, thereby opening and closing the sealing cover 2.

[0043] The drive motor 11 is fixed to the top of the first bracket 10 via a motor mount. The output shaft of the drive motor 11 passes through the top of the first bracket 10 and is fixedly connected to the end of the lead screw 7. The drive motor 11 drives the lead screw 7 to rotate, thereby adjusting the position of the sealing cover 2, making the experimental operation more convenient.

[0044] Two second supports 8 are vertically fixedly installed on the upper surface of the experimental platform 1, symmetrically arranged on both sides of the first support 10. Guide rods 9 are embedded inside each of the two first supports 10, and two movable seats 12 are movably fitted onto the outside of the guide rods 9 through mounting holes on their surfaces. During the adjustment of the position of the sealing cover 2 by rotating the lead screw 7, the sealing cover 2 moves with the movable seats 12, causing the movable seats 12 to simultaneously slide against the outside of the guide rods 9. The guide rods 9, parallel to the lead screw 7, ensure the stability of the sealing cover 2's movement direction.

[0045] The experimental platform 1 is equipped with a feeding assembly for feeding materials into the sand trough 3. The feeding assembly includes a feeding trough 17 rotatably mounted on the experimental platform 1, and a cylinder 16 rotatably mounted between the feeding trough 17 and the experimental platform 1. A fixing frame 15 is fixedly mounted perpendicular to the upper surface of the experimental platform 1 on one side of the positioning assembly. Bearings are embedded in the inner walls on both sides of the fixing frame 15, and one end of each of the two movable shafts 30 is embedded in the two bearings. The other ends of the two movable shafts 30 are symmetrically fixed to the two sides of the movable seat 29. The movable seat 29 is fixed to the lower surface of the feeding trough 17, allowing the feeding trough 17 to rotate up and down.

[0046] A first connecting seat 22 is fixedly installed on the lower surface of the feeding trough 17, and a first rotating shaft 25 is embedded inside the first connecting seat 22. A second connecting seat 28 is fixedly installed on the upper surface of the experimental platform 1, and a second rotating shaft 27 is embedded inside the second connecting seat 28. A second connecting piece 26 is fixedly installed on the cylinder end of the cylinder 16, and a first connecting piece 24 is fixedly installed on the movable end of the cylinder 16. The first connecting piece 24 is movably sleeved on the outside of the first rotating shaft 25 through a mounting hole opened on its surface. The second connecting piece 26 is movably sleeved on the outside of the second rotating shaft 27 through a mounting hole opened on its surface. This makes both ends of the cylinder 16 hinged to the feeding trough 17 and the experimental platform 1, respectively.

[0047] After fixing the sand-filling trough 3 onto the experimental table 1, the solenoid valve of the air guide pipe connected inside the cylinder 16 is opened. This causes the movable end of the cylinder 16 to drive the hinged feeding trough 17 to rotate, so that the material-dropping end of the feeding trough 17 faces the sand-filling trough 3. Then, material is fed into the sand-filling trough 3 through the feeding trough 17, thus facilitating the operation process for relevant personnel.

[0048] This embodiment describes an indoor simulation experimental device for formation sand fixation. The working principle is as follows: First, the drive motor 11 rotates the lead screw 7, causing the movable seat 12 connected to the external thread of the lead screw 7 to open the sealing cover 2. Then, the sand loading trough 3 is embedded between four positioning seats 13, and the sand loading trough 3 is fixed to the experimental table 1 by positioning components 14. Next, the movable end of the cylinder 16 drives the hinged feeding trough 17 to rotate, so that the material dropping end of the feeding trough 17 faces the sand loading trough 3, and material is then fed into the trough 17. Then, the guide rail 20 allows the testing end of the strength tester 21 to be embedded inside the test hole 18 and extend to the internal formation sand fixation surface. Finally, the sealing cover 2 is adjusted to cover the outside of the experimental area.

[0049] Then, the temperature inside the sealing cover 2 is adjusted by the heating element 6, and the pressure plate 5 is moved into the sand-filling tank 3 by the movable end of the hydraulic cylinder 4, applying pressure to the sand-fixing formation inside. The sand-fixing strength of the formation under different temperature and pressure environments is tested by the strength tester 21, and the test data is finally obtained.

[0050] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0051] Furthermore, the terms “first,” “second,” “third,” and “fourth” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as “first,” “second,” “third,” or “fourth” may explicitly or implicitly include at least one of those features.

[0052] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An indoor simulation experimental device for formation sand fixation, comprising an experimental platform (1) and a sand-filling tank (3), characterized in that: The experimental platform (1) is provided with a positioning component for fixing the sand tank (3), the experimental platform (1) is provided with a strength tester (21), and the experimental platform (1) is provided with a displacement component that drives the strength tester (21) to move toward the sand tank (3). The experimental platform (1) is provided with a sealing cover (2) covering the outside of the experimental area. The top of the experimental platform (1) and the inner wall of the sealing cover (2) are both provided with environmental change simulation components.

2. The indoor simulation experimental device for sand fixation of strata according to claim 1, characterized in that: The environmental change simulation component includes a temperature change simulation component and a pressure change simulation component.

3. The indoor simulation experimental device for sand fixation of strata according to claim 2, characterized in that: The temperature change simulation component includes a cavity (23) opened on the top of the experimental platform (1), and the cavity (23) is located at the center of the positioning component. An electric heating tube (6) is embedded inside the cavity (23).

4. The indoor simulation experimental device for sand fixation of strata according to claim 2, characterized in that: The pressure change simulation component includes a hydraulic cylinder (4) fixedly installed on the top of the inner wall of the sealing cover (2). A pressure plate (5) is fixedly installed on the piston end of the hydraulic cylinder (4), and the pressure plate (5) corresponds to the sand loading groove (3).

5. The indoor simulation experimental device for sand fixation of strata according to claim 1, characterized in that: The displacement component includes a support base (19) fixedly installed on the test bench (1), a guide rail (20) is provided between the support base (19) and the strength tester (21), and a test hole (18) corresponding to the strength tester (21) is opened on the side wall of the sand filling trough (3).

6. The indoor simulation experimental device for sand fixation of strata according to claim 1, characterized in that: The positioning component includes a positioning seat (13) fixedly installed on the experimental table (1), and the inner cavity of the positioning seat (13) is threadedly connected to a positioning element (14).

7. The indoor simulation experimental device for sand fixation of strata according to claim 1, characterized in that: The experimental platform (1) is equipped with an adjustment component for opening and closing the sealing cover (2).

8. The indoor simulation experimental device for sand fixation of strata according to claim 7, characterized in that: The adjustment assembly includes a lead screw (7) rotatably mounted on the experimental table (1), and the lead screw (7) is externally threaded with a movable seat (12), which is fixedly mounted on the side wall of the sealing cover (2).

9. The indoor simulation experimental device for sand fixation of strata according to claim 1, characterized in that: The experimental platform (1) is equipped with a feeding component for feeding materials into the sand loading tank (3).

10. The indoor simulation experimental device for formation sand fixation according to claim 9, characterized in that: The feeding assembly includes a feeding trough (17) rotatably mounted on the experimental table (1), and a cylinder (16) is rotatably mounted between the feeding trough (17) and the experimental table (1).

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